"For the residents, businesses and investors of Ecco Ripley, this Green Star - Communities rating is independent proof that they can trust, and verifies Ecco Ripley as one of Australia's most sustainable communities," Ms Madew said.

The development was assessed by the GBCA against best practice benchmarks for liveability, prosperity, environment, design, governance and innovation.

Sekisui House Australia CEO Toru Abe said the rating reinforced the organisation's commitment to developing a sustainability community.

"Sustainability is a major focus in the design of Ecco Ripley and to Sekisui House. For us, sustainability isn't just a buzz word - it means 'built to last'," Mr Abe said.

"Our investment in sustainability will continue to pay dividends for residents and investors, in the form of reduced running costs."

Featured of Ecco Ripley recognised by the GBCA included:

Large scale tree planting at Ecco Ripley with more than 2000 native trees and shrubs planted and 93,000 native groundcovers already planted in the first 12 months.

More than 76ha of recreation parks and gardens.

A commitment to 25% of housing being affordable for first home buyers and key workers, 10% allocated for accessible housing and 5% for social housing.

12,000 jobs created over the life of the project.

Implementation of fibre optic infrastructure.

An active transport plan, involving buses, on and off-road cycling and pedestrian footpaths.